Highlights

• Rainfall Prediction : Fairly heavy rainfall is predicted for Sabaragamuwa, Southern and Western provinces during 10th – 14th September.
• Monitored Rainfalls : Fairly heavy rains were experienced in the Central, Sabaragamuwa & Southern provinces with max of 94.5 mm in Matara district on 4th September.
• Monitored Wind :From 31st Aug-6th Sept: up to 15 km/h from Southwesterly were experienced over the island.
• Monitored Sea Surface : Sea surface temperature was observed above 0.5°C to the West of Sri Lanka and neutral to the East.

Interpretation

Monitoring

Rainfall  : During the last two weeks, there had been fairly heavy rainfall over the following Provinces: Central, Sabaragamuwa and Southern.

Wind : South westerly winds prevailed in the sea area and around the island during last week.

Temperatures: The temperature temperature anomalies were normal for the whole country last week – driven by the warm SST’s.

Prediction

Rainfall : During the next week (10th – 14th September) fairly heavy rainfall is predicted for
Sabaragamuwa, Southern and Western provinces.

Temperatures : The temperature remains slightly normal for August. During 10th – 18th September, the temperature remains high especially in the Eastern and Uva provinces.

Teleconnections:
La Nina -The SST forecast indicates that the La Niña event has transitioned to ENSO-neutral and will likely remain so through the boreal summer.
MJO shall be active, thus giving slightly enhanced rainfall during 10th – 22nd September.